docs: def parse_args():
      """
      Parse the command line arguments
      """
      parser = argparse.ArgumentParser(
          description="Import existing secrets to YubiHSM eco system",
          add_help=True, formatter_class=argparse.ArgumentDefaultsHelpFormatter,)
      parser.add_argument('-D', '--device',
                          dest='device',
                          default=default_device,
                          required=False,
                          help='YubiHSM device',
                          )
      parser.add_argument('-O', '--output-dir', '--aead-dir',
                          dest='output_dir',
                          default=default_dir,
                          required=False,
                          help='Output directory (AEAD base dir)',
                          metavar='DIR',
                          )
      parser.add_argument('-v', '--verbose',
                          dest='verbose',
                          action='store_true', default=False,
                          help='Enable verbose operation',
                          )
      parser.add_argument('--debug',
                          dest='debug',
                          action='store_true', default=False,
                          help='Enable debug operation',
                          )
      parser.add_argument('--public-id-chars',
                          dest='public_id_chars',
                          type=int, default=default_public_id_chars,
                          required=False,
                          help='Number of chars in generated public ids',
                          metavar='NUM',
                          )
      parser.add_argument(
          '--key-handles',
          dest='key_handles',
          nargs='+',
          required=True,
          help='Key handle(s) to encrypt the imported secrets with',
          metavar='HANDLE',
       )
      parser.add_argument('--internal-db',
                          dest='internal_db',
                          action='store_true', default=False,
                          help='Store key in YubiHSM internal database',
                          )
      parser.add_argument(
          '--aes-key',
          dest='aes_key',
          required=False,
          default=None,
          help='AES key to use when generating AEADs (no YubiHSM)',
          metavar='HEXSTR',
       )
      parser.add_argument('--random-nonce',
                          dest='random_nonce',
                          action='store_true', default=False,
                          help='Let the HSM generate random nonce',
                          )
  
      args = parser.parse_args()
      if args.internal_db:
          if len(args.key_handles) != 1:
              sys.stderr.write("--internal-db requires exactly one key handle.\n")
              sys.exit(1)
          if args.aes_key:
              sys.stderr.write("--internal-db incompatible with --aes-key.\n")
              sys.exit(1)
      return args